Patent US2727031A successfully refreshed from Google Patents.
US2727031A
Expired / Lapsed
US
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Metalliferous pyrazolone azodyestuffs
Assignee: BASF Schweiz AG
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Filing: 1952-07-22
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Granted: 1955-12-13
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Expires: 1972-07-22
Abstract
No abstract record available.
Inventors
- 👤 Zickendraht Christian
- 👤 Buehler Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:34
CPC Classifications
C; C09; C09B; C09B45/00; C09B45/02; C09B45/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A COMPLEX METAL COMPOUND OF MONOAZO DYESTUFFS FREE FROM SULFONIC ACID AND CARBOXYLIC ACID GROUPS, WHICH CONTAINS TWO MONOAZO DYESTUFFS SO BOUND IN COMPLEX UNION WITH A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND COBALT THAT THE RATIO OF THE NUMBER OF METAL ATOMS BOUND IN COMPLEX UNION TO THE NUMBER OF MONAZO DYESTUFF MOLECULES IS SMALLER THAN 1:1 AND SUBSTANTIALLY ABOUT 1:2, AND IN WHICH ONE OF THE MONOAZO DYESTUFFS PRESENT CORRESPONDS TO THE FORMULA
Claim 2
Dependent Claim
78 words
A COMPLEX METAL COMPOUND OF MONOAZO DYESTUFFS FREE FROM SULFONIC ACID AND CARBOXYLIC ACID GROUPS, WHICH CONTAINS TWO MONOAZO DYESTUFFS SO BOUND IN COMPLEX UNION WITH A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND COBALT THAT THE RATIO OF THE NUMBER OF METAL ATOMS BOUND IN COMPLEX UNION TO THE NUMBER OF MONAZO DYESTUFF MOLECULES IS SMALLER THAN 1:1 AND SUBSTANTIALLY ABOUT 1:2, AND IN WHICH ONE OF THE MONOAZO DYESTUFFS PRESENT CORRESPONDS TO THE FORMULA
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |